Add GH Actions test workflow

Author: sebastiaanluca

.github/workflows/test.yml

@@ -0,0 +1,57 @@
+name: Check code
+
+on:
+  push:
+  pull_request:
+
+jobs:
+
+  check:
+    name: Run PHP tests - PHP ${{ matrix.php }} - Laravel ${{ matrix.laravel }} - ${{ matrix.dependency-version }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [8.0, 8.1]
+        laravel: [9.*]
+        dependency-version: [prefer-lowest, prefer-stable]
+        os: [ubuntu-latest]
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Cache PHP dependencies
+        uses: actions/cache@v2
+        with:
+          path: '**/vendor'
+          key: ${{ runner.os }}-vendor-cache-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-vendor-cache-
+
+      - name: Cache Composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ~/.composer/cache/files
+          key: composer-${{ runner.os }}-php-${{ matrix.php }}-laravel-${{ matrix.laravel }}-${{ hashFiles('composer.json') }}
+
+      - name: Validate Composer configuration file
+        run: composer validate --strict
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          extensions: mbstring
+          coverage: none
+
+      - name: Install dependencies
+        run: |
+          composer require "laravel/framework:${{ matrix.laravel }}" --no-interaction --no-progress --no-update --no-suggest
+          composer update --${{ matrix.dependency-version }} --prefer-dist --no-interaction --no-progress --no-suggest --optimize-autoloader
+
+      - name: Lint code
+        run: vendor/bin/php-cs-fixer fix --dry-run --diff
+
+      - name: Run tests
+        run: vendor/bin/phpunit